std::allocator::allocate

 

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动态内存管理

低级别的内存管理
分配器 Original: Allocators The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
allocator
allocator_traits （C++11）
allocator_arg_t （C++11）
allocator_arg （C++11）
uses_allocator （C++11）
scoped_allocator_adaptor （C++11）
未初始化的存储空间 Original: Uninitialized storage The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
uninitialized_copy
uninitialized_copy_n （C++11）
uninitialized_fill
uninitialized_fill_n
raw_storage_iterator
get_temporary_buffer
return_temporary_buffer
智能指针 Original: Smart pointers The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
unique_ptr （C++11）
shared_ptr （C++11）
weak_ptr （C++11）
auto_ptr （过时了）
owner_less （C++11）
enable_shared_from_this （C++11）
bad_weak_ptr （C++11）
default_delete （C++11）
垃圾收集的支持 Original: Garbage collection support The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
declare_reachable （C++11）
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declare_no_pointers （C++11）
undeclare_no_pointers （C++11）
pointer_safety （C++11）
get_pointer_safety （C++11）
杂项 Original: Miscellaneous The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
pointer_traits （C++11）
addressof （C++11）
align （C++11）
C库 Original: C Library The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
malloc calloc	realloc free

 

std::allocator

成员函数 Original: Member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

allocator::allocator

allocator::~allocator

allocator::address

allocator::allocate

allocator::deallocate

allocator::max_size

allocator::construct

allocator::destroy

非成员函数 Original: Non-member functions The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

operator== operator!=

 

pointer allocate( size_type n, std::allocator<void>::const_pointer hint = 0 );

分配n * sizeof(T)字节的未初始化的存储通过调用::operator new(std::size_t)，但它是不确定的，这个函数被调用时，如何。指针hint可用于提供地方参考：分配器，如果支持的实施，将试图靠近可能hint分配新的内存块。.

Original:

Allocates n * sizeof(T) bytes of uninitialized storage by calling ::operator new(std::size_t), but it is unspecified when and how this function is called. The pointer hint may be used to provide locality of reference: the allocator, if supported by the implementation, will attempt to allocate the new memory block as close as possible to hint.

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参数

n	-	的对象的数目来分配存储空间 Original: the number of objects to allocate storage for The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.
hint	-	附近的一个内存位置的指针 Original: pointer to a nearby memory location The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions.

返回值

适当对齐的存储器块的第一个字节的指针，并足以保持nT类型的对象的一个​​数组.

Original:

Pointer to the first byte of a memory block suitably aligned and sufficient to hold an array of n objects of type T.

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例外

如果分配失败，抛出std::bad_alloc.

Original:

Throws std::bad_alloc if allocation fails.

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另请参阅

allocate [静态的] </ SPAN></div></div>	分配未初始化的存储，使用分配器 Original: allocates uninitialized storage using the allocator The text has been machine-translated via Google Translate. You can help to correct and verify the translation. Click here for instructions. （公共静态成员函数of std::allocator_traits）